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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Assembling Molecular Shuttles Powered by Reversibly Attached Kinesins
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Published on: January 26, 2019

Self-healing polymeric materials.

Ying Yang1, Marek W Urban

  • 1Department of Materials Science and Engineering and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC 29634, USA.

Chemical Society Reviews
|July 19, 2013
PubMed
Summary
This summary is machine-generated.

Self-healing polymers mimic nature, utilizing thermodynamic principles and chemical reactions for repair. Future materials require high glass transition temperatures and stimuli-responsive, hierarchical designs for advanced self-healing capabilities.

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Area of Science:

  • Materials Chemistry and Engineering
  • Polymer Science

Background:

  • Self-healing materials are inspired by nature, representing a significant advancement in materials science.
  • Polymers capable of autonomous repair are crucial for extending material lifespan and functionality.

Purpose of the Study:

  • To review recent advances in self-healing polymers.
  • To discuss the thermodynamic and chemical principles underlying self-healing mechanisms.
  • To highlight future challenges and design considerations for advanced self-healing materials.

Main Methods:

  • Thermodynamic analysis of self-healing networks, focusing on Gibbs free energy contributions (entropy and enthalpy).
  • Classification and discussion of chemical reactions enabling self-healing: covalent bonding, supramolecular assemblies, ionic interactions, chemo-mechanical processes, and shape memory polymers.
  • Review of recent strategies including encapsulation, remote self-healing, and the role of shape memory polymers.

Main Results:

  • Chain flexibility is key to entropy changes, while reaction heat and external energy influence enthalpy.
  • Covalent bonding, supramolecular assemblies, ionic interactions, chemo-mechanical healing, and shape memory polymers are primary self-healing mechanisms.
  • Encapsulation and remote self-healing are emerging techniques.

Conclusions:

  • Designing high glass transition temperature (Tg) polymers with stimuli-responsive attributes is a major challenge.
  • Future self-healing materials will require controllable hierarchical heterogeneity for effective remote physical and chemical repair.